P is a state machine-based programming language designed specifically for formally modeling and specifying complex distributed systems. It supports multiple backend analysis engines, such as model checking and symbolic execution, to help verify that systems meet correctness specifications. P has been widely adopted by Amazon AWS, for example, in analyzing the strong consistency protocols of S3, and has also been used in implementing USB device driver stacks for Microsoft Windows 8 and Windows Phone. Experience shows that P serves as a thinking tool to help developers rigorously design systems, acts as a bug finder to identify edge cases missed in testing, and improves development speed. The project has been developed collaboratively by industry and academia since 2013, is open-sourced on GitHub, and welcomes contributions. Formal methods provide a solution for reliability and efficiency in distributed systems and are an important tool in cutting-edge technology fields.
